<template>
    <el-card>
      <el-form inline>
        <el-form-item>
           <el-input v-model="paramsState.username" placeholder="用户名" />
        </el-form-item>
  
        <el-button type="primary" :icon="Search" @click="search">查询</el-button>
        <el-button type="default" @click="resetSearch">清空</el-button>
      </el-form>
  
      <div style="margin: 20px 0">
        <el-button type="primary" @click="showAddUser">添 加</el-button>
        <el-button type="danger" @click="revomveUsers" :disabled="tableState.selectedIds.length===0">批量删除</el-button>
      </div>
  
      <el-table
        border
        stripe
        v-loading="listLoading"
        :data="tableState.users"
        @selection-change="handleSelectionChange">
  
        <el-table-column
          type="selection"
          width="55" />
  
        <el-table-column
          type="index"
          label="序号"
          width="80"
          align="center"
        />
  
        <el-table-column prop="username" label="用户名" width="150" />
        <el-table-column prop="nickName" label="用户昵称" />
        <el-table-column prop="roleName" label="角色列表" width="200"/>
        
        <el-table-column prop="gmtCreate" label="创建时间" width="180"/>
        <el-table-column prop="gmtModified" label="更新时间" width="180"/>
  
        <el-table-column label="操作" width="200" align="center" fixed="right">
          <template v-slot="{row}">
            <el-button type="info" size="small" :icon="UserFilled" title="分配角色"
              @click="showAssignRole(row)"/>
            <el-button type="primary" size="small" :icon="Edit" title="修改用户"
              @click="showUpdateUser(row)"/>
            <el-popconfirm :title="`确定删除 ${row.username} 吗?`" @confirm="removeUser(row.id)">
              <template #reference>
                <el-button style="margin-left:10px" type="danger" size="small" :icon="Delete" title="删除用户"/> 
              </template>
            </el-popconfirm>
          </template>
        </el-table-column>
      </el-table>
  
      <el-pagination
        :current-page="paramsState.page"
        :page-size="paramsState.limit"
        :total="tableState.total"
        :page-sizes="[5, 10, 20, 30]"
        style="padding: 20px 0;"
        layout="prev, pager, next, jumper, ->, sizes, total"
        @current-change="getUsers"
        @size-change="getUsers(1, $event)"
      />
  
      <el-dialog :title="userState.user?.id ? '修改用户' : '添加用户'" 
        v-model="userState.dialogUserVisible">
        <el-form ref="userFormRef" :model="userState.user" :rules="userRules" label-width="120px">
          <el-form-item label="用户名" prop="username">
            <el-input v-model="userState.user.username"/>
          </el-form-item>
          <el-form-item label="用户昵称">
            <el-input v-model="userState.user.nickName"/>
          </el-form-item>
          
          <el-form-item v-if="!userState.user.id" label="用户密码" prop="password">
            <el-input v-model="userState.user.password"/>
          </el-form-item>
        </el-form>
        <template #footer>
          <div class="dialog-footer">
            <el-button @click="cancel">取 消</el-button>
            <el-button :loading="userState.userLoading" type="primary" @click="addOrUpdate">确 定</el-button>
          </div>
        </template>
      </el-dialog>
  
      <el-dialog title="设置角色" v-model="roleState.dialogRoleVisible" :before-close="resetRoleData">
        <el-form label-width="80px">
          <el-form-item label="用户名">
            <el-input disabled :value="userState.user.username"></el-input>
          </el-form-item>
  
          <el-form-item label="角色列表">
            <el-checkbox :indeterminate="roleState.isIndeterminate" v-model="roleState.checkAll" 
              @change="handleCheckAllChange">全选</el-checkbox>
            <div style="margin: 15px 0;"></div>
            <el-checkbox-group v-model="roleState.userRoleIds" @change="handleCheckedChange">
              <el-checkbox v-for="role in roleState.allRoles" :key="role.id" :label="role.id">{{role.roleName}}</el-checkbox>
            </el-checkbox-group>
          </el-form-item>
        </el-form>
  
        <template #footer>
          <el-button :loading="roleState.roleLoading" type="primary" @click="assignRole">保存</el-button>
          <el-button @click="resetRoleData">取消</el-button>
        </template>
      </el-dialog>
    </el-card>
  </template>
  
  <script lang="ts">
    export default {
      name: 'User',
    };
  </script>
  
  <script lang="ts" setup>
    import { ElCard, ElForm, ElFormItem, ElInput, ElButton, ElTable, ElTableColumn, 
      ElPopconfirm, ElPagination, ElDialog, ElCheckbox, ElCheckboxGroup, ElMessage, ElMessageBox } from 'element-plus'
    import type {FormInstance} from 'element-plus'
    import { Search, Edit, UserFilled, Delete} from '@element-plus/icons-vue'
    import { reactive, ref, onMounted, nextTick } from 'vue';
    import type { UserListModel, UserModel } from '@/api/acl/model/userModel';
    
    import type { RoleListModel } from '@/api/acl/model/roleModel';
    import { assignUserRoleListApi, getUserRoleListApi, removeUsersApi, removeUserApi, getUserListApi, saveOrUpdateUserApi } from '@/api/acl/user';
  
    const listLoading = ref(false) // 是否显示列表加载的提示
    const paramsState = reactive({
      username: '',
      searchUsername: '',
      page: 1, // 当前页码
      limit: 5, // 每页数量
    })
  
    interface TableState {
      total: number, 
      users: UserListModel, 
      selectedIds: string[]
    }
    const tableState = reactive<TableState>({
      total: 0,
      users: [],
      selectedIds: []
    })
  
    /* 
    自定义密码校验
    */
    const validatePassword = (rule: any, value: any, callback: any) => {
      if (!value) {
        callback('密码必须输入')
      } else if (!value || value.length < 6) {
        callback('密码不能小于6位')
      } else {
        callback()
      }
    }
    
    // 用户添加/修改表单的校验规则
    const userRules = { 
      username: [
        { required: true, message: '用户名必须输入' },
        { min: 4, message: '用户名不能小于4位' }
      ],
      password: [
        { required: true, validator: validatePassword }
      ]
    }
  
    interface UserState {
      dialogUserVisible: boolean
      userLoading: boolean
      user: UserModel
    }
  
    const userState = reactive<UserState>({
      dialogUserVisible: false,
      userLoading: false,
      user: {
        username: '',
        nickName: '',
        password: ''
      },
    })
  
    interface RoleState {
      dialogRoleVisible: boolean
      roleLoading: boolean
      checkAll: boolean
      isIndeterminate: boolean
      userRoleIds: string[]
      allRoles: RoleListModel
    }
    const roleState = reactive<RoleState>({
      dialogRoleVisible: false,
      roleLoading: false,
      checkAll: false,
      isIndeterminate: false,
      userRoleIds: [],
      allRoles: []
    })
  
    const userFormRef = ref<FormInstance>()
  
    onMounted(() => getUsers())
  
    /* 
    显示指定角色的界面
    */
    const showAssignRole = (user: UserModel) => {
      userState.user = user
      roleState.dialogRoleVisible = true
      getRoles()
    }
  
    /* 
    全选勾选状态发生改变的监听
    */
    const handleCheckAllChange = (value: string | number | boolean) => {// value 当前勾选状态true/false
      // 如果当前全选, userRoleIds就是所有角色id的数组, 否则是空数组
      roleState.userRoleIds = value ? roleState.allRoles.map(item => item.id as string) : []
      // 如果当前不是全选也不全不选时, 指定为false
      roleState.isIndeterminate = false
    }
  
    /* 
    异步获取用户的角色列表
    */
    const getRoles = async () => {
      const result = await getUserRoleListApi(userState.user?.id as string)
      const {allRolesList, assignRoles} = result
      roleState.allRoles = allRolesList
      roleState.userRoleIds = assignRoles.map(item => item.id as string)
      
      roleState.checkAll = allRolesList.length===assignRoles.length
      roleState.isIndeterminate = assignRoles.length>0 && assignRoles.length<allRolesList.length
    }
  
    /* 
    角色列表选中项发生改变的监听
    */
    const handleCheckedChange = () => {
      const {userRoleIds, allRoles} = roleState
      roleState.checkAll = userRoleIds.length === allRoles.length && allRoles.length>0
      roleState.isIndeterminate = userRoleIds.length>0 && userRoleIds.length<allRoles.length
    }
  
    /* 
    请求给用户进行角色授权
    */
    const assignRole = async  () => {
      const userId = userState.user?.id
      const roleIds = roleState.userRoleIds.join(',')
      roleState.roleLoading = true
      await assignUserRoleListApi(userId as string, roleIds)
      roleState.roleLoading = false
      ElMessage.success('分配角色成功')
      resetRoleData()
  
      // console.log(this.$store.getters.name, this.user)
      // if (this.$store.getters.name===this.user.username) {
      //   window.location.reload()
      // }
    }
  
    /* 
    重置用户角色的数据
    */
    const resetRoleData = () => {
      Object.assign(roleState, {
        dialogRoleVisible: false,
        allRoles: [],
        userRoleIds: [],
        isIndeterminate: false,
        checkAll: false
      })
    }
  
    /* 
    根据输入进行搜索
    */
    const search = () => {
      paramsState.searchUsername = paramsState.username
      getUsers(1)
    }
  
    /* 
    重置输入后搜索
    */
    const resetSearch = () => {
      paramsState.searchUsername = ''
      paramsState.username = ''
      getUsers(1)
    }
  
    /* 
    显示添加用户的界面
    */
    const showAddUser = () => {
      userState.user = {
        username: '',
        nickName: '',
        password: ''
      }
      userState.dialogUserVisible = true
  
      nextTick(() => userFormRef.value?.clearValidate())
    }
  
    /* 
    删除所有选中的用户
    */
    const revomveUsers = () => {
      ElMessageBox.confirm('确定删除吗?').then(async () => {
        await removeUsersApi(tableState.selectedIds)
        ElMessage.success('删除成功')
        getUsers()
      }).catch(() => {
        ElMessage.info('取消删除')
      })
    }
  
    /* 
    列表选中状态发生改变的监听回调
    */
    const handleSelectionChange = (selection: any[]) => {
      tableState.selectedIds = selection.map(item => item.id)
    }
  
    /* 
    显示更新用户的界面
    */
    const showUpdateUser = (user: UserModel) => {
      userState.user = {...user}
      userState.dialogUserVisible = true
    }
  
    /* 
    删除某个用户
    */
    const removeUser = async (id: string) => {
      await removeUserApi(id)
      ElMessage.success('删除成功')
      getUsers(tableState.users.length===1 ? paramsState.page-1 : paramsState.page)
    }
  
    /* 
    获取分页列表
    */
    const getUsers = async (page=paramsState.page, limit=paramsState.limit) => {
      paramsState.page = page
      paramsState.limit = limit
      listLoading.value = true
      const result = await getUserListApi(page, limit, {username: paramsState.searchUsername})
      listLoading.value = false
      const {items, total} = result
      tableState.users = items
      tableState.total = total
      tableState.selectedIds = []
    }
  
    /* 
    取消用户的保存或更新
    */
    const cancel = () => {
      userState.dialogUserVisible = false
      userState.user = {
        username: '',
        nickName: '',
        password: ''
      }
    }
  
    /* 
    保存或者更新用户
    */
    const addOrUpdate = async () => {
      // 进行表单校验
      await userFormRef.value?.validate()
  
      const {user} = userState
      if (user.username==='admin') {
        alert('admin账号不能添加或更新')
        return
      }
      userState.userLoading = true
      try {
        await saveOrUpdateUserApi(user)
        userState.userLoading = false
        ElMessage.success('保存成功!')
        getUsers(user.id ? paramsState.page : 1)
        userState.user = {
          username: '',
          nickName: '',
          password: ''
        }
        userState.dialogUserVisible = false
      } catch (error) {
        userState.userLoading = false
      }
    }
  
  </script>
  